HK1118771A1 - Fastening device for externally fastening cables or lines to housings - Google Patents

Abstract

A fastening device for externally fastening cables or lines to housings, especially to the housing of brake cylinders, includes a fastening pin that can be locked in a breather of the housing. A connecting channel is configured in the fastening pin via which channel, in the locked state, the interior of the housing communicates with the atmosphere.

Description

Fixing device for externally fixing a cable or a line to a housing

Technical Field

The invention relates to a fastening device for externally fastening a cable or a line to a housing, comprising a fastening pin which can be latched to a vent of the housing and in which a connecting channel is formed.

Background

One such fixing device is described in JP 2003168878A and is used to fix cables to a rack. A similar type of fastening device is disclosed in US 5967468A. It holds an antenna cable to a tower.

One such fastening device is described in the previously unpublished DE 102004044939, which is used to fasten cables or lines from the outside to the housing of a brake cylinder. It is present in a retaining clip which is connected on the one hand to the annular fold of the housing part of the brake cylinder and on the other hand to the housing via a pin which can be snapped into a housing vent opening.

Disclosure of Invention

In contrast, the object of the present invention is to provide a fixing device for fixing cables or lines to a housing, which is improved in terms of function.

The invention provides a fixing device for externally fixing a cable or a pipeline on a shell, which comprises a fixing pin, a fixing pin and a connecting channel, wherein the fixing pin can be locked with a vent hole of the shell, the connecting channel is formed in the fixing pin, and the interior of the shell is communicated with the atmosphere through the connecting channel in a locking state; the fixing pin comprises at least two elastically deformable arms which project outward from the base body and have a gap arranged in the middle, the gap forming a connecting channel; the base body is provided with at least two standardized receptacles for the elastic plastic cable connectors, each receptacle pointing in a different direction; each standardized receptacle is designed such that a plastic cable connector can be latched to the receptacle.

In the present invention, it is proposed to use a fastening device known from JP 2003168878A or US 5967468A for locking a fastening pin in a vent opening of a housing, in particular in a vent opening of a housing of a brake cylinder. The interior of the housing is then vented to atmosphere in the latched state. Since a connecting channel is formed in the fastening pin, the ventilation opening is not closed, and thus, in addition, the function of ensuring the outflow of condensate from the interior of the housing and the exchange of air can be achieved. This is particularly important in the case of the fact that, as is usual in practice, a large number of cables and lines are fastened to the housing of the brake cylinder and thus a large number of ventilation openings must be used as fastening points for the fastening means, which are otherwise closed and thus must be supplemented by further ventilation openings which increase the production costs. In particular, a plurality of ventilation openings can be provided with a fixing device of this type, in which no air exchange or condensate outflow is lost, so that cables and lines can also be attached at a plurality of points on the housing. Since the ventilation opening can perform the ventilation and drainage tasks without hindrance, the risk of corrosion in the interior of the housing is reduced, which is of great advantage in particular in safety-relevant brake cylinders.

It is particularly preferred that the fastening device is fastened to the housing only by means of a fastening pin, and that the fastening pin is latched in the vent hole such that the fastening device can be rotated about the pin axis relative to the housing. The cables and lines, which are generally rigid, can thus be freely oriented relative to the housing, where the fixing device is turned into the corresponding direction. It is thus possible to avoid deflections or bends in the cables and lines, which on the one hand increase their service life due to the stress-free nature and on the other hand enable short laying lengths, which is advantageous primarily in the pneumatic lines of the brake cylinders, which have a length-dependent flow resistance.

The locking of the fastening pin with the ventilation opening of the housing can be achieved, for example, in that the fastening pin comprises at least two elastically deformable arms which project outward from the base body and have a centrally arranged slot which forms the connecting channel. The fastening pin thus fulfills a dual function, in that it serves to fasten the fastening device to the housing in a lockable manner on the one hand, and also simultaneously forms the connecting channel on the other hand.

In the case of a detent pin which is locked in the vent opening, the closure of the connecting channel is avoided, for example, by at least one spacer element which, in the locked state, contacts the outer surface of the housing projecting outwardly from the base body, so that an end section of the channel extending beyond the outer surface is open to the atmosphere at least from the side.

Furthermore, according to another preferred measure, the base body can be provided with a through-opening for the passage of a cable connector of elastic plastic which is wound around the cable and the line to be fastened to the housing. The base body can furthermore be provided with at least two standardized receptacles for such a flexible plastic cable connector, each receptacle pointing in a different direction. The cables and pipes which cross each other can thus be fixed in bundles on the housing. In combination with the possibility of rotation of the fastening device, a large number of directions can thus be formed in which the cables and lines can run in a direction-free manner with respect to the housing.

The particularly preferably plastic cable connector can also be latched to the standardized receptacle, for example by the standardized receptacle being formed by a receiving pin with an undercut cross section, which can be snapped into an opening of the fastening section of the plastic cable connector.

Drawings

Embodiments of the invention are illustrated in the drawings and are explained in detail in the following description. Wherein:

FIG. 1 is a cross-sectional view of a brake cylinder with a fixing device according to a preferred embodiment of the present invention;

FIG. 2 is a partial detailed view of the fixture of FIG. 1;

fig. 3 is a perspective view of the holding device of fig. 1 with a resilient plastic cable connector secured thereto.

Detailed Description

Fig. 1 shows a combined service brake and spring-loaded brake system 1. The service brake and spring-loaded brake system comprises a service brake mechanism 2 with a service brake cylinder 4, in which a pneumatically loadable service brake piston 6 is guided, which via a service brake piston rod 8 actuates, for example, a disk brake of a commercial vehicle, which is not shown for reasons of scale. Furthermore, a spring-loaded brake mechanism 10 is provided with a spring-loaded brake cylinder 12, in which a spring-loaded brake piston 18 is guided, which can be tensioned by pneumatic pressure in a spring-loaded brake chamber 14 against the spring force of a storage spring 16 and by which the service brake piston 6 can be acted upon in a brake application direction. The service brake cylinder 4 and the spring brake cylinder 12 are arranged coaxially in succession to form a combined brake cylinder 20.

The spring brake piston rod 24 of the spring brake piston 18 passes sealingly through a passage opening 26 in a partition 28 between the spring brake cylinder 12 and the service brake cylinder 4 and can be seated with its end face against the service brake piston 6. The service brake piston 6 may comprise an axially movable diaphragm 32, which is clamped on the outer edge between the diaphragm 28 and a radially outer shoulder 30 on the edge of the service brake cylinder 4, and a central piston disk 34 (fig. 2) connected to the diaphragm 32.

The shoulder 30 is preferably bent over 90 degrees to create a contact surface that is inclined relative to the membrane 32. On the other hand, the partition 28 is also provided with an inclined contact surface on its radially outer edge, so that a cross section which widens in a wedge-like manner towards the radial outside is produced between them, in which cross section the complementarily formed outer edge 36 of the membrane 32 is held in a form-fitting manner. In order to stabilize the form fit and to connect the service brake cylinder 4 to the spring brake cylinder 12, the edge 42 of the latter overlaps the shoulder 30 of the service brake cylinder 4 in a form fit, in particular by means of a form-fitting bead 44, wherein the edge 42 of the spring brake cylinder 12 is plastically deformed.

In a known manner, the spring-loaded brake piston 18 can be moved into the release position against the action of the energy-storing spring 16 by venting the spring-loaded brake chamber 14. Furthermore, by venting the service brake chamber 38 extending between the partition 28 and the service brake piston 6, the service brake piston is moved into the compressed position against a return spring 46, which is supported on one side on the service brake piston 6 and on the other side on the end wall of the service brake cylinder 4. In particular, a mechanical release mechanism 47 is integrated into the spring-loaded brake piston rod 24, with which the spring-loaded brake mechanism 10 can be released in an emergency or assisted manner in the event of a pressure failure.

The function of such a combined service brake and spring-loaded brake system 1 is described fully in DE 102004060862 a1, for example, and is therefore not discussed further here.

An annular chamber 50 formed between the partition 28 and the circumferential wall 48 of the spring brake cylinder 12 is connected to the atmosphere in the interior of the combined service brake and spring brake system 1 by means of a plurality of ventilation openings 52, which are arranged, for example, circumferentially on the circumferential wall 48 in the region of the flange 44.

In order to fasten the lines, in particular pneumatic lines or cables, externally to the combined service brake and spring-loaded brake system 1, a fastening device 54 is provided, which comprises a fastening pin 56 that can be latched in a vent hole 52. As can be seen in particular from fig. 2, the fastening pin 54 comprises preferably two elastically deformable arms 60, 62 which project outward from the base body 58 and have a slot 64 arranged in the middle. The arms 60, 62 have a cross section which is tapered at the ends with undercuts (hinderschneidung) so that the arms 60, 62 are bent radially inward when introduced into a ventilation opening 52 and spring back outward after reaching the final latching position, so that the undercuts can latch behind an inner edge of the ventilation opening 52 and the fastening device 54 is thereby held axially on the spring brake cylinder 12. The diameters of the retainer pin 56 and the vent hole 52 are designed so that the retainer device 54 can freely rotate about the pin axis relative to the spring brake cylinder 12.

The slot 64 of the fixing pin 56 simultaneously forms a connecting channel, through which the interior of the annular chamber 50 is connected to the atmosphere, and allows the arms 60, 62 to move elastically in the radial direction. In order to leave the gap 64 uncovered by the circumferential wall 48 of the spring brake cylinder 12 in the inserted state of the retaining pin 56, two spacers which contact the outer surface of the circumferential wall 48 of the spring brake cylinder 12 project outwardly from the base body 58, for example in the form of spacer pins 66, so that an end section 68 of the gap 64 which extends beyond the circumferential wall 48 is open to the atmosphere from the side, as is evident from fig. 2. The end section 68 of the slot is thus open to both sides and can be connected to the atmosphere. The securing pin 56 is arranged here, for example, between two spacer pins 66. Alternatively, the connecting channel 64 can also pass through the base body 58 and thus open into the atmosphere.

Furthermore, the base body 58 is provided with at least two standardized receptacles for the elastic plastic cable connectors 70, each of which points in a different direction. Elastic plastic cable connectors are known per se, which have an elastically bendable plastic strip 72 with a tongue 74 at one end and a loop 76 at the other end, wherein the surface of the tongue 74 is provided with latching projections which can be snapped into openings of the loop 76 in stages in order to establish an arbitrary winding diameter for the purpose of tightening a bundle of cables and/or lines or also individual cables and/or lines and which can be held in a tensile manner. One such resilient plastic cable connector 70 is shown in fig. 3 in a yet open position fitted over the fixture 54. Such a plastic cable connector 70 can be connected to standardized receiving elements 78, 80 which project in different directions from the base body 58 and which preferably consist of a receiving pin with an undercut cross section which can be snapped into an opening of a fastening section 82 of the plastic cable connector 70. One such fastening section 82 can be formed by a sleeve section with an insertion opening, from which latching projections project radially inward, which, in the inserted state, engage behind the receiving pins 78, 80.

The base body 58, the securing pin 56, the spacer pin 66 and the receiving pins 78, 80 can be produced as a single-piece body from plastic. Furthermore, the base body 58 can be provided with a through-opening 84 for the passage of the elastic plastic cable connector 70, which does not have to have its own fastening section. In particular, such a fastening device 54 can be accommodated in a plurality of ventilation openings 52, since the air exchange and the condensate water outflow are always ensured by means of the connecting channel 64 in the fastening pin 56.

List of reference numerals

1 work braking and spring energy storage braking device

2 working brake mechanism

4 working brake cylinder

6 working brake piston

8 working brake piston rod

10 spring energy storage brake mechanism

12 spring energy-storage brake cylinder

14 spring energy storage brake cavity

16 energy storage spring

18 spring energy-storage brake piston

20 combination brake cylinder

22 fastening bolt

24 spring energy storage brake piston rod

26 through hole

28 baffle plate

30 shoulder

32 film

34 piston disc

36 edge

38 working brake chamber

42 edge

44 fold

46 return spring

48 peripheral wall

50 annular cavity

52 vent hole

54 fixing device

56 fixed pin

58 base body

60 arm

62 arm

64 gap

66 spacer pin

68 end segment

70 plastic cable connector

72 Plastic belt

74 tongue

76 snap ring

78 receiving pin

80 receiving pin

82 fixed section

84 penetration gap

Claims (5)

1. Fastening device for externally fastening a cable or a line to a housing (12) of a brake cylinder, comprising a fastening pin (56) which can be latched to a vent hole (52) of the housing (12), a connecting channel (64) being formed in the fastening pin (56), the interior (50) of the housing (12) being vented to the atmosphere via the connecting channel (64) in the latched state; the fastening pin (56) comprises at least two elastically deformable arms (60, 62) which project outward from the base body (58) and have a slot arranged in the middle, which slot forms a connecting channel (64); the base body (58) is provided with at least two standardized receptacles (78, 80) for the elastic plastic cable connector (70), each receptacle pointing in a different direction; each standardized receptacle (78, 80) is designed such that a plastic cable connector (70) can be latched to the receptacle.

2. The fixture according to claim 1, wherein: the fastening pin (56) is latched in the ventilation opening (52) in such a way that the fastening device (54) can be rotated about the pin axis relative to the housing (12).

3. The fixture according to claim 1, wherein: at least one spacer (66) contacting the outer surface of the housing (12) projects outwardly from the base body (58) so that an end section (68) of the gap (64) extending beyond the outer surface is open to the atmosphere at least from the side.

4. The fixture according to claim 1, wherein: the base body (58) is further provided with a through-opening (84) for the passage of a flexible plastic cable connector (70).

5. The fixture according to claim 1, wherein: the standardized receiving elements (78, 80) are formed by a receiving pin with an undercut cross section, which can be snapped into an opening of a fastening section (82) of the plastic cable connector (70).